Automatic lock



F. J. BORRUP AUTOMATIC LOCK Feb. 3, 1953 Filed Feb. 6 1951 INVENTOR.IREJJERIK .l BDRRUP 'ATTORNEY Patented Feb. 3, 1953 UNITED STATES rOFFICE Claims.

This invention relates to new and useful improvements in looks and hasparticular relation to a closure actuated lock for automatically lookinga closure in closed position on the latter being moved from open toclosed position.

An object of the invention is to provide a selflocking or automatic lockof simple yet rugged structure, which is reliable in use and adapted forlong, useful life and may be manufactured at reasonable cost.

Another object is to provide an automatic lock including severalfeatures of construction whereby on being actuated to released positionit will remain in such position even though the closure is not opened oruntil the operator is ready to move the closure to open position, whichcan be manually moved following its automatic looking to draw togetherthe sashes of a window when used as a window lock or to draw moretightly closed another type of closure, which cannot be tampered withfrom the outside of the closure and will resist all efforts to open theclosure, and which is easily installed even by unskilled persons.

Another object is to provide a self-locking or automatic lock for thesashes of a double hung window.

Other objects and advantages of the invention will become apparent froma consideration of the following detailed description taken inconnection with the accompanying drawing wherein a satisfactoryembodiment of the invention is shown. However, it is to be understoodthat the invention is not limited to the details disclosed but includesall such variations and modifications as fall within the spirit of theinvention and. the scope of the appended claims.

In the drawing:

Fig. l is a sectional view through the meeting rails and adjacentportions of the top and bottom sashes of a double hung window andshowingmy improved lock in place thereon and with the bottom sash raised andthe lock mount cut away on one side to show the'mechanism;

Fig. 2 is a similar view but with the sashes closed and the lock locked;

Fig. 3 is aview similar to Fig. 2 but with the lock released whereby thesashes may be opened or moved relatively; and

Fig. 4 is a top plan view of the lock on portions of the meeting railsof the sashes of a double hung window.

Referring in detail to the drawing, at H3 is generally indicated thelower portion of the top sash of a double hung window and at ii isgenerally indicated the upper portion of the bottom cash of such window.Thus, in the sash portions it! and I i are shown the meeting rails l2and I3 comprising respectively the bottom rail of the top sash Iii andthe top rail of the bottom sash Ii. My improved loclngenerallydesignated I4, is mounted on the mentioned meeting rails and comprises akeeper part generally designated l5 and a latch part generallydesignated 16, such parts: being mounted on the rails 12 and i3,respectively.

Keeperpart 115 comprises a base or mounting portion ll through which ispassed screws or other fasteners id for securing the base against theupper side of the rail I2. Rigid with and actually shown as integralwith said base is an upstanding post if! out out through its front facewhereby it comprises a hook portion having an inclined under surface 2|located at a rather acute angle to an inclined front face 22. Further,it is noted that the forward surface 23 of the hook 20 is rearwardly ofthe forward face 24 of the base ll.

Such base has achannel 25 through the mid portion of its under side andextending from front to back. Channel 25 receives the connecting portionof a trip device comprising a fiat spring including a relatively longfront arm 26, a connecting portion 21 passing under the base I1, and arear arm 28. The front and rear arms 26 and 28 bear against verticalportions of the base or of the keeper portion thereof and it will beseen that the spring passing through the channel 25 is held in positionwhen the keeper part [5 is mounted on rail l2. Here it is noted that thespring arm 26 extends upwardly partly across the front side of thecutout or undercut opening in the post it and has its upper end portion29 rearwardly offset at a steep incline. The pur pose of thistrippingdevice comprising the described spring will be fully set forth.

The lock part- It comprises a body 30 including lateral portions throughwhich maybe passed screws or other fasteners 3| for mounting the body onthe upper side of rail l3 whereby to be in line with and adjacentthekeeper part 15 when the top'and bottom sashes l0 and II are bothclosed. Body 30 is shown as provided with a pair of upstanding ears 32and 33 arranged in spaced relation. Between the cars 32 and 3 3, body 30includes an outer arcuate surface portion 34 terminating in a shoulder35 beyond which is aninner arcuate surface portion 36 terminatisnig at;one edge of an upper surface or shoulder A pin 38 passing through oneend portion, spe- 3 cifically the upper or inner end portion of a latch.39, p-ivotally mounts said latch for swinging movement as will bedescribed. At its other end portion, latchBEi is offset or provided witha toe or hook 4i) adapted to cooperate with the hook of the keeper byengaging the under surface of the latter for the locking of the sashesclosed, as in Fig. 2. For the purpose of later description, the heelportion of the latch 39 rearwardly of the toe it, is here designated 4|and in the released or set position of the latch, such portion 4| isagainst the stop or limiting shoulder 35 whereby the set or releasedposition of the latch is a predetermined position.

A hand lever, generally designated 62 and. somewhat in the form of aninverted T, includes a handle 33 and arms 44' and 45 at the inner endsof said handle and extending in substantially opposite directionstherefrom. Arm E4 is bifurcated and straddles or receives in itsbifurcation a web 45 formed integral with an intermediate portion of thelatch 39'and a pivot pin 41 passing through these overlapped partspivotally connects said arm A l and thus the entire hand lever with thelatch.

When the parts It and it are mounted on the rails 12 and i3, they aremounted adjacent the opposed edges of said rails and in alignment andthe latter is readily accomplished by aligning the fastening screws Idof the keeper part with the fastening screws 3! of the latch part. Whenthe lock is unlocked, the parts are related as in Fig. 1, i. e., thespring arm is in a. substantially vertica1 position, the latch portion4| is against the stop or shoulder of the mounting element, and theforward portion of the'toe 4B of the latch is projecting inwardly orforwardly over the innermost edge of. the base 30 of the. mountingelement.

Additionally, the underside of the arm 45. of hand lever 52 is restingagainst the surface orshoulder 31 of the base. In this relation of theparts, the projected portion of toe 40, is'so located. that on a closingmovement of the sashes, or of one sash relative to the other, suchprojecting portion of the toe will clear the front face 23' of the hook2:; but will engage the inclinedtop' surface of the upper end portion 29of. the spring arm 26.

The relative movement of the sashes, i. e., the

movement of either sash to closed relation with respect to the other,brings about the engagement of the projecting portion of the toe 49 withthe spring arm 26. 'As a result, there is'a tendency to lift the latch39 through an arcuate movement, the center of which is the pivot pin 38.Thus, as the latch is lifted, its toe is swung inwardly and is pressingagainst the spring arm 26 and enters under the hook 20 of the keeper sothat the upper inclined surface of the toe engages the under inclinedsurface 2| of the hook MYwhereby the latch and keeper are tightlyengaged.

The same described swinging movement of the latch results in a drawingforwardly, as well as a slight raising, of the arm 44 and thus of thearm 45 of the: hand lever 62 so that the arm 4.? is drawn forwardly offthe surface or shoulder 37. Then the weight of the handle 43 causes agravitational swinging of; the entire hand lever 42 on the pivot-41whereby the hand lever moves to theposltion in Fig. 2. There it will beseen that the end surface of the hand lever arm 65 is now against thearcuate surface 36 above mentioned. 'I-hus, the hand lever is-lockedagainst swinging movement with latch 39 in a clockwise direction aboutpivot pin 33 and arm pq itions 4s and 45 constitute a strut retainingthe latch 39 against such movement. Surface 36 is in eccentric relationto the pivot l when the latter is located as in Fig. 2. That is theportion of said surface adjacent stop 35 is closer to the pivot than isthe portion of said surface adjacent shoulder 31. Therefore, downwardpressure on the handle thrusts upwardly through the strut 4445 on thelatch 39. If the sashes cannot move relatively vertically they are drawninto relation with their meeting rails .tight together by-engagement ofthe inclined surface 2| of the keeper acting with the upper inclinedsurface of the toe 49.

Movement of the latch in a counter clockwise direction is prevented byits interlocking with the keeper hook 251. Thus it will be seen that thelatch 39 is rigidly held in the position in which it is shown in Fig. 2.With the latch engaging the keeper hook the bottom sash ll cannot beraised and the top sash cannot be lowered. Therefore, the sashes arelocked in their closed positions. This locking is accomplishedautomatically and thus a householder 'or the like closes the sashes andautomatically locks them and cannot forget to lock them.

When the lock is released handle 43 is used to manipulate it and swingit as from the position of Fig. 2 to the dotted line position'of Fig. 3,thus drawing the latch. in a clockwise direction about the pivot 33 andwithdrawing the toe it of the latch from looking engagement with hook ofthe keeper. This movement brings the heelportion ii of the latch againststop 35 and carries the arm 65 of hand lever 42 upwardly above'thearouate surface 33 above the shoulder or' stop 31 as the hand levermoves rearwardly on' the described clockwise movement of the latch. Thenthe operator may release the hand lever and it will, by gravity, drop tothe full line position of Fig. 3 without causing any movement ofthelatch which it will be seen is still deflecting the spring arm 26 tosome extent.

Now, when one of the sashes is moved relative to the other, as into therelationship of Fig. l, the engagement of the arm 65 of the hand leverwith the shoulder 31 prevents the hand lever from gravitating abouteither its pivot pin t! or the pivot pin 33 of the latch and so theoverbalancing effect 0i the handle 43 on the hand lever cannot causemovement of the latch from its set or released position with its heelportion 4i engaging the stop 35. Therefore, the latch is accuratelypositioned in a predetermined location to again be deflected by thespring arm 26 into locking relation with the keeper on the sashes beingclosed by movement of either one'of them.

Having thus set forth the nature of m invention, What I claim is:

1. In a loclg'a' keeper comprising a post including a base or mountingportion and an outer portion the front edge'of which is locatedrearwardly of the front face of said base, said outer portion undercut"whereby it comprisesa hook portion the under surface'of which inclinesinwardly and upwardly of the post, a latch for cooperation with saidkeeper and comprising a mounting member, a'latch pivoted atone end tosaid mounting and at its other end including a toe inclined on its upperside and adapted to enter under the hook of said keeper with theinclined side of the toe engagingthe inclined surface of the keeper, ahand lever including a handle and an arm, said arm pivoted to said latchintermediate the ends of the latter for shifting thereof, said handleoverbalancing said hand lever, and normally tending to shift the same toshift said latch to locking position, and a shoulder on said mountingmember and releasably holding said hand lever against such movement.

2. In a lock, a keeper part, a latch part comprising a latch adapted tolock with said keeper, a mounting member, means pivoting said latch onsaid mounting member for pivotal movement between a set position free ofsaid keeper and a locked position engaging said keeper, hand lever forshifting said latch from said locked to said set position, a trip meansfor shifting said latch from said set to said locked position onmovement of one of said parts in a plane parallel with but to pass theother, said hand lever being pivotally mounted and normally under theinfluence of gravity to move said latch from the first mentioned to thesecond mentioned of said positions, and a shoulder on said mounting inthe path of movement of said hand lever when the latch is in setposition to restrain such movement of said hand lever under theinfluence of gravity.

3. A closure lock comprising a keeper part and a latch part adapted oneto be mounted on a closure for movement therewith relative to the otheras the closure is moved between closed and open positions, said keeperpart comprising a post having a hook portion, said latch part comprisinga mounting means, a latch pivoted on said mounting means for swingingmovement between a locked position engaging the hook portion of saidkeeper and a released position free thereof for relative movement of thelock parts, means on said mounting for engaging and limiting swingingmovement of said latch to the last named position whereby the latter isa predetermined position, and a spring on said keeper part andpositioned to engage said latch and direct it into locking engagementwith the hook portion of said keeper post on movement of said closure toclosed position.

4. A closure lock comprising a keeper part and a latch part adapted oneto be mounted on a closure for movement therewith relative to the otheras the closure is moved between closed and open positions, said keeperpart comprising a post having a hook portion, said latch part comprisinga mounting means, a latch pivoted on said mounting means for swingingmovement between a locked position engaging the hook portion of saidkeeper and a released position free thereof for relative movement of thelock parts, means on said mounting for engaging and limiting swingingmovement of said latch to the last named position whereby the latter isa predetermined position, a spring on said keeper part and posi tionedto engage said latch and direct it into locking engagement with the hookportion of said keeper post on movement of said closure to closedposition, a hand lever pivoted to said latch intermediate the ends ofthe latter and operable to swing said latch to said released positionfree of said hook portion of the keeper part, said hand lever includinga handle located laterally of the pivotal connection of the lever withsaid latch whereby said hand lever is constantl tending to gravitate toa position carrying said latch about its pivot from its predeterminedreleased position, means on said mounting and positioned to engage saidhand lever and prevent such gravitational movement thereof, and saidlast means having a fixed location whereby on shifting of said latch onengagement with said spring said hand lever is bodily shifted formovement in a path free of said means.

5. An automatic lock for the sashes of a double hung window, a keeperpart and alatch part to be mounted on the meetingrails of the sashes ofsuch a window, said keeper part to be fixed to the upper side of themeeting rail of a top sash and comprising a post having a hook portion,said latch part to be mounted on the upper side of the meeting rail ofthe bottom sash of such a window and including a mounting member, alatch piv oted at one end to said member and at its other end having atoe to engage under the hook portion of said keeper to lock said sashesin closed relation, a handle on said latch part for swinging said latchfrom locked position to a predetermined released position, a shoulder onsaid mounting member in the path of swinging movement of said latch toreleased position and limiting such swinging movement to that necessaryto move the latch to said predetermined position, and a spring anchoredto said keeper part and normally located in a position to engage theunderside of the toe of said latch and swing the latter on its pivotalmounting and direct said toe under and into locking engagement with thehook of the keeper on movement of one of said sashes to closed positionwhen the other is in closed position.

6. The automatic look as in claim 5 including a hand lever for shiftingsaid latch from looking position to said predetermined releasedposition, and said hand lever including a portion pivotally connectedwith said latch at one end and at its other end bearing against saidmounting member when the latch is in looking engagement with the keeperhook and constituting a strut for rigidly holding said latch in suchposition.

'7. In a lock including a keeper part and a latch part, said latch partincluding a mounting comprising a base and an upstanding wall, a latchpivoted on said wall for swinging movement from a locked engagement withsaid keeper part to a released position, said base including an uppersurface including an arcuate portion along which said latch may swingand a shoulder at the inner end of said portion in the path of swingingmovement of the latch from locked position whereby said latch has apredetermined released position, and a hand lever for moving said latchto said released position.

8. In a lock including a keeper part and a latch part, said latch partincluding a mounting comprising a base and an upstanding wall, a latchpivoted on said wall for swinging movement from a locked engagement withsaid keeper part to a released position, said base including an uppersurface including an arcuate portion along which said latch may swingand a shoulder :at the inner end of said portion in the path of swingingmovement of the latch from locked position whereby said latch has apredetermined released position, a hand lever for moving said latch onits pivot to said released position, means associated with the keeperpart and located to be engaged by said latch when the latter is inreleased position and one of said parts is moved with a closure to aclosed position of the latter to rock said latch on its pivot intolocking engagement with said keeper; said hand lever being pivoted tosaid latch and movable therewith as the latter is moved to lockingrelation with said keeper, said upper surface of the base including asecond arcuate portion along which said hand lever moves as the latch ismoved into locking relation with the keeper, and said hand leverincluding a portion to engage said surface and function as a strutmaintaining said latch in locked relation with'said keeper.

9. In a lock including a keeper part and a latch part includingamounting and a latch pivoted on said mounting and swingable betweenlocking engagement with said keeper and a predetermined releasedposition, a hand lever for swinging said latch to released position,said hand lever including a strut portion, and said mounting having aconcave arcuate surface portion against which said strut portion engagesand along which it moves as said latch moves for maintaining said latchin locking engagement with said keeper.

10. 'I he, device as in claim 8 wherein said second arcuate surface iseccentric to the pivot of said hand lever when said latch is engagingsaid keeper whereby further movement of the hand lever in the samedirection is a wedging action operating through said strut on saidlatch.

FREDERIK J. BORRUP.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

